Barrie : Règlement no 2006-140, art. 4(4) — Noise By-law

Use of Instrumentation

• (a) Battery Check If the Integrating Sound Level Meter uses a battery, the condition of the battery shall be checked before each measurement, and measurement shall not commence unless the battery has sufficient life remaining to permit proper operation for a period of at least one hour.
• (b) Calibration The Integrating Sound Level Meter shall be calibrated before and after each measurement period. By-law 2006-140 31 Office Consolidation The Corporation of the City of Barrie Noise By-law
• (c) Instrument Configuration
• (i) Reflective Surfaces The microphone shall be located not less than 1 m above the ground, not less than 1 m from any sound reflective surface

except for the purposes of subclause 4(3)(a)(ii) and not less than arm’s length from the body of the person operating the meter. Not more than one person, other than the operator of the meter, shall be within 7 m of the microphone and that person shall be behind the operator of the meter. For the case of subclause 4(3)(a)(ii) the microphone shall be in the middle of the aperture located not less than 15 cm from the window frame or door frame.

• (ii) Microphone Orientation The microphone shall be oriented such that the sound to be measured is incident at an angle recommended by the microphone manufacturer for flattest frequency response in a free field.
• (d) Extraneous Sources

When measuring the sound from a source, integration shall from time to time be inhibited by the operator immediately

when the received sound is dominated by sound from a source other than the source under study and it shall remain inhibited while such a condition persists and for at least 10 seconds thereafter. While integration is inhibited the elapsed time used to calculate the equivalent sound level shall not be allowed to accumulate.

• (e) Timing If the Integrating Sound Level Meter is not provided with an internal elapsed-time clock, the operator shall accumulate the elapsed time during the measurement period by means of a stop-watch or other time measuring device.
• (f) Readings
• (i) Stationary Source

When measuring the sound from a stationary source, measurements to be used in calculating results shall be taken during a continuous period not in excess of one hour and, for purposes of calculation and reporting of results, the accumulated elapsed time of measurement as obtained in accordance with clause

• (d) is deemed to be one hour if the accumulated time is 20 minutes or more. Measurements containing information from an accumulated time period of less than 20 minutes are insufficient for purposes of calculating the equivalent sound level
• (Leq) of a stationary source.
• (ii) Road Traffic Noise Sources

When measuring the sound from road traffic the accumulated elapsed time obtained in accordance with clause

• (d) shall not be less than twenty minutes and the actual accumulated elapsed time of measurement shall be used for purposes of calculation.
• (g) Adjustments Adjustments for quality of sound shall be made in accordance with Publication NPC-104 - Sound Level Adjustments and the result reported.

No adjustment shall be made for intermittence.

• (h) Variation in Calibration

A measurement shall not be reported if the Integrating Sound Level Meter calibration after the measurement period is more than 0.5 dB different from that before the measurement commenced. By-law 2006-140 32 Office Consolidation The Corporation of the City of Barrie Noise By-law

• (i) Weather Conditions
• (i) Wind Measurements shall not be made unless the wind-induced sound level is more than 10 dB below the measured levels. Reference should be made to Publication NPC-102-Instrumentation and particularly Table 102-3.
• (ii) Humidity Measurements shall not be taken if the relative humidity is above the maximum for which the meter specification is guaranteed by the manufacturer (normally 90%). (iii ) Precipitation Measurements shall not be taken during precipitation.
• (iv) Temperature Measurements shall not be taken when the air temperature is outside the range for which the specification of the instrument is guaranteed by the manufacturer. (Normally, only the lower temperature limit is significant.)
• (j) Readings Reported
• (i) For sound from a stationary source, the value to be reported based on measurements made during the accumulated elapsed time of 20 minutes or more and the time period for calculation which is one hour is, after adjustment in accordance with clause (g), the one hour equivalent sound level
• (Leq) of the sound under study for any one hour period during which measurements were taken pursuant to subclause 4(4)(f)(i).
• (ii) For sound from road traffic, the value to be reported based on measurements made during the accumulated elapsed time of 20 minutes or more and the time period for calculation which is the actual accumulated elapsed time, is the one hour equivalent sound level
• (Leq) of the sound under study for any one hour period during which measurements were taken pursuant to subclause 4(4)(f)(ii).
• (iii) The one hour equivalent sound level
• (Leq) shall be reported to the nearest decibel.